wdevinier wdevinier
  • 12-07-2017
  • Chemistry
contestada

. What is the mass, in grams, of a sample of 7.83 × 1024 atoms of helium (He)?

Respuesta :

zrh2sfo
zrh2sfo zrh2sfo
  • 25-07-2017
moles He = 7.83 x 10^24 / 6.02 x 10^23 =13.0 

mass He = 13.0 mol x 4.00 g/mol = 52.0 g
Answer Link

Otras preguntas

How did a cotton gin change agriculture in the south??
In an 8.00 km race, one runner runs at a steady 11.0 km/h and other runs at 14.8 km/h. How far from the finish line is the slower runner when the fast runner fi
The perimeter of a triangle is 28ft. The medium side is 4ft longer than the shortest side, while the longest side is twice as long as the shortest side. What ar
Who discovered that the Earth took 365 days to move around the Sun?
What characteristics of the medium determine the speed of sound? How would raising the pitch of a singing voice affect the speed with which the song is carried
The sum of the length l and 19
What is the algebraic express:8 divided by the cube of y
What is the Hcf of 25 and 125
What would 300% of $25 be? Please show how.
Why is acceleration negative in a free fall?